Method for controlling concrete precooling slump by monitoring current intensity of stirrer

Abstract

The invention provides a method for controlling concrete precooling slump by monitoring current intensity of a stirrer. As for concrete at a certain mix proportion, if batch charge is the same, a slump value of the concrete is smaller, the concrete is thicker, the placeability of the concrete is poor, stirring resistance to a stirrer shaft is greater, the power consumed by the stirrer shaft is higher; on the contrary, the slump value of the concrete is larger, the placeability of the concrete is better, and the resistance to the stirrer shaft is smaller. A calculation formula of the power of the stirrer is that P is equal to U multiplied by I, wherein working current I is equal to P divided by V; voltage is invariable, and can be regarded as a constant; the power of the stirrer shaft varies with the current, and is proportional to the current, that is the slump value (SL) of the premixed concrete is inversely proportional to the current I when the stirrer shaft stirs the concrete; therefore, the concrete slump can be controlled by monitoring the current intensity of a motor of the stirrer; and the quality of the concrete is controlled finally. The method is simple and quick; the working strength of operators can be reduced effectively; the allocation of the operators can be reduced; a qualification rate of the concrete can be increased; and the production efficiency of the concrete can be improved.

Description

technical field [0001] The invention relates to the technical field of engineering construction, in particular to a method for controlling the slump of concrete out of the machine by monitoring the current intensity of a mixer. Background technique [0002] In the process of concrete construction, concrete slump is a very important indicator reflecting the workability of concrete. At present, the detection of concrete slump is only carried out through the national standard test, which requires a lot of work and only reflects the current situation. Or the workability of the truck concrete cannot fully reflect the slump and changes of all concrete. At present, most mixing plants estimate the slump by visually observing the state of the concrete leaving the machine, thereby reducing the inspection frequency, but this method has large errors and cannot predict the slump of the concrete leaving the machine stably. The two methods of actual inspection and visual inspection cannot...

AI Technical Summary

Problems solved by technology

[0002] In the process of concrete construction, concrete slump is a very important indicator reflecting the workability of concrete. At present, the detection of concrete slump is only carried out through the national standard test, which requires a lot of work and only reflects the current situation. Or the workability of the truck concrete cannot fully reflect the slump and changes of all concrete

At present, most mixing plants estimate the slump by visually observing the state of the concrete leaving the machine, thereby reducing the inspection frequency, but this method has a large error and cannot predict the slump of the concrete leaving the machine stably.

The two methods of actual inspection and visual inspection cannot fully and accurately reflect the concrete slump. The most important thing is that the state of the concrete before leaving the machine cannot be adjusted in time, resulting in a large number of unqualified phenomena.

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